first divide it into 3 groups... 4 for each group...5.39.217.77& Z/ W6 U) u7 R# z" h3 d" X
den use 2 groups to test... if the weight is same... den throw away these 2 groups.. if not... use another 1 group to test with tat 2 groups... throw away the same weight groups...
' h) N& @2 V- [' ^公仔箱論壇den... left 4 balls...TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。3 l6 O* s8 c% Q3 \ H7 ]# @
when u use tat 3 groups to test... u oredi know it is heavier or not...# x" V) T4 R, H' ?3 c5 n/ V, r
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
& L$ y; G& x2 Dtvb now,tvbnow,bttvbtake the heavier or lighter 1... throw away tat 2 normal ball...+ K* w" Z* M0 o1 }; Z1 H I" Q
den u juz nit 2 test the last 2 balls...
* O" ~; `1 @2 Ztvb now,tvbnow,bttvbsame for now... take the heavier or lighter 1... |